â€œIf we could lower the cost of moving to Mars below a certain threshold, say $2m, I could see that being a huge business. Itâ€™s not like a lot of people would have to go, just 10,000-20,000 people out of the six billion people on Earth. People could save up all their lives and instead of buying a big house â€” or moving to Florida â€” they could go to Mars.â€

I think low gravity and never having to see any of your relatives again are major selling points. The moon has even lower gravity but it's closer to earth so the risk of relatives coming to visit is greater.